Safety device for paper cutters



March 4, 1-930. A. T. MOYER 1,749,296

SAFETY DEVICE FOR PAPER GUTTERS Filed July 14. 1927 2 Sheets-Sheet 1 flvewr .jfldmwfflaler V March 4, 1930. A. T. MOYER SAFETY DEVICE FOR PAPER CUTTERS Filed July 14, 1927 2 Sheets-Sheet 2 'hwzzzzr Mrewfila Patent ed Mar 4,:193o

- ANDREW T. MOYER, OF PHILADELPHIA, PENNSYLVANLQ SAF TY "nEvIcn ron rArER cu'r'rnns Application filed July 14,

" My inventionrelates toa new and useful improvement in safety devices for paper cut- .ters and the like and has for its object to provide-a simple andefi'ective device of this de- F 6 scription which can be readily attached to a- V Inorder that those skilled in the art to which this invention appertains, may under paper cutting machine and be actuated by the reciprocations'of the'knife carrier to protect the operator from accident; 'afurther object is to so mount a buffer-bar that will be thrust outwardly when the knife 9 of i the cutter descends thereby forcing the hands of the 'operator out of the danger zone while the knife.

' is'descending; anda'still further object ofmy invention is to accomplish these resultsby a simple and cheap arrangementoflevers.

With these and other ends in view, this invention consists in the'details of construction and combinationof elements hereinafter set forth and then specifically designated by'the claims.

stand how to Imake'and-use the same, I will i I describe its construction in detail, referring bynumerals to the accompanying drawings forming a part of this application, in which: Fig. 1,isa plan view ofa paper cutting 7 machine showing'my improved safety de- .fvice attached thereto Y Fig. 2, is a front elevation of Fig. 1.

'- s Fig. 3, -is a sideelevation of a portion of the paper cutting machine partly broken away, showing my improvement in elevation,

. vated position. I

the bulfer'b-ar beingin the, position assumed when the knife of the machine is in its ele- Fig. 4, is a view similar to Fig. 3 showing the buffer bar thrust outward. i p

Fig; 5, is an enlarged section of one of the guideways, showing the rolls carried by the bufier bar frame. o

In carrying out my invention as herein embodied, 10 represents a paper cutting ma chine of the usual construction and upon the,

inner surfaces of the uprights or standards of this machine are-bolted or otherwise se-. cured the brackets 11. Each of these brackets hasextended therefrom aguideway 12 and in each of these guideways are fitted two rolls l3 journalled on the frame 14.; This frame 1927." Serial 1%. 205,613.

has secured thereto the two reach rods 16, the latter in turn being secured to the buffer bar 15. By this arrangement, the buffer bar will move back and forth with said frame while always being held in proper alignment therewith.

' 17 represents a shaft supported in the eX- tensions 18 of the brackets 11, and upon this shaft are 'journalled the hubs 19 with which latter are formed the levers 20, and the lower endsiof these levers have pivoted thereto the links 21 which in turn are pivoted to the framelQwhile the upper ends of these levers are connected'by the links 22 to the studs 23 secured upon the knife bar 24, thus when the knife bar is moved up and down, the levers 20 will beoscillated and in turn the frame 14 will be caused'to move back and forth. This simple arrangement of mechanism serves to effectually prevent accidents to the hands of the operator of the machine by being caught under the knifeiwhen the latter is descending; the buffer bar is forced downward and at the same time on a downward angle at every downward stroke of the knife tending to. shove the hands of the operator away fromthe knife as well as-awarning that the knife is on'its downward stroke.

vThis simplicity of the construction and arrangement ofomy improved safety device is suchtha't: it may readily be att-ached to a papercutting machine and as readily detached when repairs for. other work upon the -machineisfnecessary. Q

It 1s also ObVlQllS that the construction hereshown may be varied to considerable degree inadapting the device to various sizes or designs of machines,"and I, therefore, do not ".wish to'be limited to the exact details of construction of the'apparatus for carrying my invention 'intoiefiect as this maybe varied .within the limits ofthe appended claims without departing from the spirit of my invention, v, j I V Having thus fully describedmy invention, what I claim as new and useful is:

1.. A device ofthe' character described for useupon paper cutting machines provided with a reciprocating knife bar; brackets having guideways, a buffer bar, a frame carrying said buffer bar, rolls journalled upon the with the buffer bar back and forth in the lines frame and adapted to travel' in the guideof the guideways; i; p c I ways; a shaft mounted in said brackets, oscil- In testimony whereof, I have hereunto aflating levers mounted upon said shaft, links fixed my signature. r a connectingsaid levers with the frame, and r ANDREWT. MOYER. 70 means for connecting saidlevers to the knife I V I bar of the machine. f

.2. In combination with a power machine having a stationary frame and a reciprocat- V V v V 7 O ing member;two guides secured to saidframe o i 7 extending outward and "downward there. '7 I e I I from; a buffer frame slidably mounted in said guides;v a safety buffer bar carried by the bufier frame, means connecting theystationp I I I p v ary frame, buffer frame and said reciprocat- V t p '780'] 7 ing memberrfor giving the buffer framean' i outward and downward thrust in unison with the downward movement of the reciprocating -member. 1' ,7 o I, 3; In combination withapaper cutting ma: x 1 v. v q i i 535 j chine, having a stationary frame and a re: 'ciprocating member, brackets secured to said frame extensions formed with the brackets; guides carried'by the brackets and extending o o, V a c '25 outward and downward from the frame; a 1 7' 1 9,1) buffer frame positioned be'tween'the brackets c 5 I Y r 1 asafety buffer bar carried by the bufier c frame; rolls carried bysaid buffer frame and adapted to travel in the guides; a shaft sup- 7 v s c s u e v i q ported in the extensionsof'the brackets;twov v j h 7 J95 levers mounted 'uponsaid shaft adapted to i r l i oscillate; links pivoted tothe levers and to said buffer frame studs mounted on the rev c'iprocating member, other links pivoted to ,v 7 Yo v theilevers', said lastname'd links being also p V p PiVOtQClL'GOfSaiCl studs, whereby the. downf- I, "wardmovem'ent cfthe oscillating member will give :to" the bulfer frame an outwardand downwardthrust. -f I, 40 LA device of the kind described, brackets 7 4 .i 7 v 1105 forsecurementtotheframeof amachinehav l v 1 o ving a reciprocating element, said brackets I having guideways therein, aframe'recipro catingly mounted in the guidewayspa bufler p a e I c bar carried'bythe frame, extensions formed 7 7 V y I 11 with the brackets, 'a shaft mounted in 's'aid ex- Y r tensions, levers ournalled on said shaft, links pivoted to the lower endsof the levers and to the frame and other linkspivoted to the up perends of the levers to the reciprocating element of the machine whereby motionwill be transmitted from said reciprocating element ,to the frame and buffer bar} 5; Ina device bf thekind1described,brackets for sec'u'rement to the stationary frame of a paper cutting machine provided with a vertical reciprocating element, said brackets havf ing guideways inclined downwardly and outwardly at an angle to the reciprocating ele, ment of themachine, a frame mountedto move back and forth in the guideways, a i buffer bar connected with said frame to operate therewith, a mechanism connected with T the reciprocating element of'the.m'achine and the reciprocating frame-to move the *latter 

